Ranking Score Explained

Hi there, thanks for your interest in how we calculate an experience's ranking score. It's at the core of Rankers so I'm pleased you're curious.

The ranking score percentage is used to compare and sort experiences in ranking tables. It is not necessarily a direct measurement of the quality of a particular experience as rated by its customers. I've found it a useful tool to allow me to find the best experiences with confidence. But I've also found it important to read the customer reviews before making any final judgements!

We calculate an experience's ranking score using a multi-factor data model instead of a raw data average (mean). This model takes into account several important questions. For instance - is there a trusted body of reviews? What is the age of a review and is the review from a credible source?

Below you'll find details around some of the important factors that went into calculating the ranking score for Usave Car and Truck Rentals.

If you have any questions or comments about our ranking score calculation please get in touch at info@rankers.co.nz. We don't believe this is perfect or complete so we're always interested in ways we might make improvements.

Nick Morrison's avatar

Nick Morrison

Rankers owner

Usave Car and Truck Rentals

Valid Reviews

50 Valid Reviews

The Usave Car and Truck Rentals experience has a total of 51 reviews. There are 50 valid reviews that are included when calculating the ranking score and 1 invalid review that are excluded from the calculation. Reviews can be excluded only when a reviewer is not verified or after an investigation by our team determines the reviewer is not genuine.

Below is the distribution of ratings for the 50 valid reviews:

Rating Count Percentage
10/10 17
9/10 8
8/10 5
7/10 1
6/10 0
5/10 1
4/10 2
3/10 3
2/10 1
1/10 12

65.00% Average

The raw data average (mean) for all the Usave Car and Truck Rentals valid reviews is 65.00% and is based on 50 valid reviews. This value is not used to calculate the ranking score and it only provided here as a comparison to the weighted average.

Face-to-Face Reviews

7 Face-to-Face Reviews

The Rankers team meets with travellers while they’re in New Zealand and conducts face-to-face surveys. These reviews, in our opinion, are the most trusted in the industry and represent a critical control sample. To our knowledge, we are the only travel review website in the world that has gone to this extent.

More about face-to-face reviews

Within the 50 valid reviews, the experience has 7 face-to-face reviews collected during interviews by our team.

Below is the distribution of ratings for the 7 face-to-face reviews:

Rating Count Percentage
10/10 2
9/10 1
8/10 1
7/10 1
6/10 0
5/10 1
4/10 1
3/10 0
2/10 0
1/10 0

75.71% Average

The raw data average (mean) for all the Usave Car and Truck Rentals face-to-face reviews is 75.71% and is based on 7 face-to-face reviews. This value is not used to calculate the ranking score and it only provided here for comparison purposes.

Weighted Average


Rankers calculates a weighted mean as a base average on which we can improve. Individual review's ratings are given a weight based on several factors. The weight of a review determines the overall impact it'll have on the final weighted average.

Recent reviews have more weight as they are more relevant and reflect the experience as it currently operates. Over time reviews become less relevant and loose their impact on the ranking score.

Low rating reviews carry slightly less weight. This dampens the effect of very low ratings for every experience across the board. This is especially important when the experience has few reviews overall and a single negative rating can grossly mischaracterise an experience. Consistent poor reviews will still result in the experience receiving a comparitively low ranking score.

Credible sources provide reviews that can be trusted. If we have verified a reviewer is genuine via a face-to-face meeting then the review carries additional weight.

Reviewer Rating Age Relative Weight
sharon mike 4/10 22 days 92%
Martine BACH 10/10 297 days 100%
Martin 1/10 388 days 65%
Alberto 10/10 722 days 31%
Christian 8/10 814 days 19%
Eric 1/10 875 days 11%
Keith Powell 9/10 906 days 12%
Matias 2/10 1028 days 5%
Lisa 9/10 1059 days 6%
Clint Siggins 10/10 1179 days 6%
Tana FARRELL 10/10 1302 days 5%
T-a T 10/10 1302 days 5%
vanessa kelly 10/10 1302 days 5%
Shelley Gunther 10/10 1363 days 5%
Iain Steven 10/10 1363 days 5%
Peter 10/10 1393 days 5%
pbutterworth 1/10 1424 days 4%
Toby Eadie 1/10 1452 days 4%
Mia H 10/10 1483 days 5%
Matt Bridge 1/10 1483 days 4%
Clif Shaw 10/10 1483 days 5%
Olga Vogel 9/10 1500 days 3%
Murray Coombridge 8/10 1758 days 4%
Nathan Raymond 8/10 1789 days 4%
J F 10/10 1849 days 4%
Raj S 1/10 1880 days 3%
Toralf Richter 3/10 1910 days 3%
Stuart Lloyd 9/10 2063 days 4%
Shirley Jobsis 9/10 2076 days 4%
vera mokaraka 9/10 2094 days 4%
Anne Choose not to say 1/10 2155 days 2%
Alexandra 9/10 2214 days 3%
Meli Makalio 10/10 2214 days 3%
Debbie Chambers 8/10 2306 days 3%
Isabella Chichirua 10/10 2306 days 3%
sam denyer 1/10 2398 days 2%
Asha Masr 1/10 2610 days 2%
MIke Chesney 1/10 2671 days 2%
Tinkerbell 10/10 2944 days 2%
IllTakeYouToCourt 1/10 2944 days 1%
shard 3/10 2975 days 1%
jessicaelaine 3/10 2975 days 1%
Melissa Smith 1/10 2975 days 1%
Chad Johnson 8/10 3259 days 1%
Michael Charleston 4/10 3273 days 0%
EdS 9/10 3371 days 1%
Janice OConnor 10/10 3599 days 0%
Diane Gedye 5/10 3638 days 0%
Maria Fahlander 10/10 4705 days 1%
Thorsten Kabelitz 7/10 4705 days 1%


Several adjustments to the weighted average are added to improve relevancy and credibility. These adjustments apply equally to all experiences that meet the criteria.

Sample Size Adjustment

No Adjustment

A reasonable number of reviews are necessary in order for the average to be credible and for an experience to take a prime position within the ranking tables. As such, experiences with only a few reviews have a moderated score. This does not mean that the experience or the reviews can't be trusted. The Usave Car and Truck Rentals experience has plenty of reviews and does not meet the criteria for any adjustment.

Recent Reviews Adjustment

-2.83% Adjustment

Recent reviews reflect the experience as it currently operates. This means it's important to get fresh reviews. Some experiences discovered they could get a few good reviews and then, resting on their laurels, discourage any further reviews. This adjustment stimulates experiences to be positively involved in the review generating process and discourages them from manipulating the ranking system in this manner.

What constitutes a recent review is based on the how old it is, what type of experience it is applied to and and what time of year it currently is. Due to the seasonal nature of many businesses, what is considered recent is dynamically adjusted throughout the year.

There may be an adjustment if this experience hasn't received enough reviews within the last 48 days. The Usave Car and Truck Rentals experience has 1 recent ranking. Adjustments are according to the following table:

Recent Reviews Adjustment
0 -3.00%
1 -2.83%
2 -2.33%
3 -1.50%
4 -0.67%
5 -0.17%
6 -0.00%

In addition, an experience's ranking score may be adjusted for each day there is no new ranking. However the Usave Car and Truck Rentals experience does not meet the criteria for any adjustment.

Final Ranking Score


The final ranking score once adjustments and rounding has been applied. This value is cached and recalculated each day. Therefore it may not be precisely accurate based on the other values presented.

If you have any questions or comments about our ranking score calculation please get in touch at info@rankers.co.nz.